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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_asio.reference.experimental__coro_traits"></a><a class="link" href="experimental__coro_traits.html" title="experimental::coro_traits">experimental::coro_traits</a>
</h3></div></div></div>
<p>
        <a class="indexterm" name="boost_asio.indexterm.experimental__coro_traits"></a>
      </p>
<p>
        The traits describing the resumable coroutine behaviour.
      </p>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span>
    <span class="keyword">typename</span> <span class="identifier">Yield</span><span class="special">,</span>
    <span class="keyword">typename</span> <span class="identifier">Return</span><span class="special">,</span>
    <span class="keyword">typename</span> <a class="link" href="Executor1.html" title="Executor requirements">Executor</a><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">coro_traits</span>
</pre>
<h5>
<a name="boost_asio.reference.experimental__coro_traits.h0"></a>
        <span class="phrase"><a name="boost_asio.reference.experimental__coro_traits.types"></a></span><a class="link" href="experimental__coro_traits.html#boost_asio.reference.experimental__coro_traits.types">Types</a>
      </h5>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                <p>
                  Name
                </p>
              </th>
<th>
                <p>
                  Description
                </p>
              </th>
</tr></thead>
<tbody>
<tr>
<td>
                <p>
                  <a class="link" href="experimental__coro_traits/completion_handler.html" title="experimental::coro_traits::completion_handler"><span class="bold"><strong>completion_handler</strong></span></a>
                </p>
              </td>
<td>
                <p>
                  Completion handler type used by async_resume.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <a class="link" href="experimental__coro_traits/error_type.html" title="experimental::coro_traits::error_type"><span class="bold"><strong>error_type</strong></span></a>
                </p>
              </td>
<td>
                <p>
                  The error type of the coroutine. void for noexcept.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <a class="link" href="experimental__coro_traits/input_type.html" title="experimental::coro_traits::input_type"><span class="bold"><strong>input_type</strong></span></a>
                </p>
              </td>
<td>
                <p>
                  The value that can be passed into a symmetrical cororoutine. void
                  if asymmetrical.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <a class="link" href="experimental__coro_traits/result_type.html" title="experimental::coro_traits::result_type"><span class="bold"><strong>result_type</strong></span></a>
                </p>
              </td>
<td>
                <p>
                  The type received by a co_await or async_resume. It's a combination
                  of yield and return.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <a class="link" href="experimental__coro_traits/return_type.html" title="experimental::coro_traits::return_type"><span class="bold"><strong>return_type</strong></span></a>
                </p>
              </td>
<td>
                <p>
                  The type that can be passed out through a co_return.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <a class="link" href="experimental__coro_traits/signature_type.html" title="experimental::coro_traits::signature_type"><span class="bold"><strong>signature_type</strong></span></a>
                </p>
              </td>
<td>
                <p>
                  The signature used by the async_resume.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <a class="link" href="experimental__coro_traits/yield_type.html" title="experimental::coro_traits::yield_type"><span class="bold"><strong>yield_type</strong></span></a>
                </p>
              </td>
<td>
                <p>
                  The type that can be passed out through a co_yield.
                </p>
              </td>
</tr>
</tbody>
</table></div>
<h5>
<a name="boost_asio.reference.experimental__coro_traits.h1"></a>
        <span class="phrase"><a name="boost_asio.reference.experimental__coro_traits.data_members"></a></span><a class="link" href="experimental__coro_traits.html#boost_asio.reference.experimental__coro_traits.data_members">Data
        Members</a>
      </h5>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                <p>
                  Name
                </p>
              </th>
<th>
                <p>
                  Description
                </p>
              </th>
</tr></thead>
<tbody><tr>
<td>
                <p>
                  <a class="link" href="experimental__coro_traits/is_noexcept.html" title="experimental::coro_traits::is_noexcept"><span class="bold"><strong>is_noexcept</strong></span></a> <span class="silver">[static]</span>
                </p>
              </td>
<td>
                <p>
                  Whether or not the coroutine is noexcept.
                </p>
              </td>
</tr></tbody>
</table></div>
<p>
        Template parameter <code class="computeroutput"><span class="identifier">Yield</span></code>
        specifies type or signature used by co_yield, <code class="computeroutput"><span class="identifier">Return</span></code>
        specifies the type used for co_return, and <code class="computeroutput"><span class="identifier">Executor</span></code>
        specifies the underlying executor type.
      </p>
<h5>
<a name="boost_asio.reference.experimental__coro_traits.h2"></a>
        <span class="phrase"><a name="boost_asio.reference.experimental__coro_traits.requirements"></a></span><a class="link" href="experimental__coro_traits.html#boost_asio.reference.experimental__coro_traits.requirements">Requirements</a>
      </h5>
<p>
        <span class="emphasis"><em>Header: </em></span><code class="literal">boost/asio/experimental/coro_traits.hpp</code>
      </p>
<p>
        <span class="emphasis"><em>Convenience header: </em></span>None
      </p>
</div>
<div class="copyright-footer">Copyright © 2003-2025 Christopher M.
      Kohlhoff<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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